# MathML tilde, check and hat accents don't stretch

RESOLVED FIXED in mozilla2.0b4

Core
MathML
RESOLVED FIXED
9 years ago
7 years ago

## Tracking

Trunk
mozilla2.0b4
PowerPC
Mac OS X
Points:
---
Dependency tree / graph

## Attachments

### (4 attachments)

 3.10 KB, application/xhtml+xml Details 44.64 KB, image/png Details 35.56 KB, image/png Details 3.10 KB, application/xhtml+xml Details
(Reporter)

### Description

9 years ago
User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9b3pre) Gecko/2008020201 SeaMonkey/2.0a1pre
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9b3pre) Gecko/2008020201 SeaMonkey/2.0a1pre

These math accents are supposed to stretch. In current trunk, they don't.

Reproducible: Always

Steps to Reproduce:
1.
2.
3.
(Reporter)

### Comment 1

9 years ago
Created attachment 301824 [details]
testcase
(Reporter)

### Comment 2

9 years ago
Created attachment 301825 [details]
incorrect rendering for wide-tilde, wide-check and wide-hat
(Reporter)

### Comment 3

9 years ago
Created attachment 301826 [details]
rendering from Camino (in which these accents do stretch)

### Updated

9 years ago
Depends on: 407101, 414277
(Reporter)

### Comment 4

9 years ago
Hmmm, in the latest nightlies (Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.5; en-US; rv:1.9b5pre) Gecko/2008030701 SeaMonkey/2.0a1pre), the \overline and \hat accents in the testcase are screwed up as well.

### Comment 5

9 years ago
(In reply to comment #4)
That sounds like bug 421955.

(Reporter)

### Comment 6

9 years ago
It sure looks like it is. But will be good to check back when that bug is fixed.

### Updated

9 years ago
Status: UNCONFIRMED → NEW
Ever confirmed: true
(Reporter)

### Comment 7

9 years ago
In the latest nightlies, the \hat (and \widehat) accents have entirely disappeared.

### Comment 8

9 years ago
(In reply to comment #7)
> In the latest nightlies, the \hat (and \widehat) accents have entirely
> disappeared.

I don't know why that's changed.

&Hat; represents U+005E and which seems to render (even if it doesn't stretch), but this test case uses U+0302, which doesn't render.  Would you mind filing a separate bug on that being missing, please?  Do you know how often U+0302 is used for accents?  It doesn't seem to be in the sample operator dictionary:

http://www.w3.org/TR/2007/WD-MathML3-20071214/appendixb.html#oper-dict.entries
(Reporter)

### Comment 9

9 years ago
>&Hat; represents U+005E and which seems to render (even if it doesn't stretch),
but this test case uses U+0302, which doesn't render.

Hmmm. This was changed in itex2MML 1.1.2, to work around a then-current  (5/2006) bug in Gecko.

I could change it back, but there would still be content out there, created in the past two years, using U+0302.

>Would you mind filing a separate bug on that being missing, please?

I will do so tomorrow.

### Updated

9 years ago
Depends on: 427659
(Reporter)

### Comment 10

8 years ago
This bug still seems to be present in the latest Gecko Trunk

### Comment 11

7 years ago
(In reply to comment #9)
> >&Hat; represents U+005E and which seems to render (even if it doesn't stretch),
> but this test case uses U+0302, which doesn't render.
>
> Hmmm. This was changed in itex2MML 1.1.2, to work around a then-current
> (5/2006) bug in Gecko.
>
> I could change it back, but there would still be content out there, created in
> the past two years, using U+0302.
>

U+0302 is defined as a combining circumflex.  It's purpose is to display a circumflex over the following character thus combining this pair of Unicode characters to form a single displayed symbol.

As such, IMHO it should never stretch.

### Comment 12

7 years ago
Created attachment 423222 [details]
Testcase 2

This is the same as the original testcase with the exception of using U+005E for the hat rather than the incorrect U+0302.

This testcase renders correctly in builds that contain the patches attached to bu 519126, bug 524275 and bug 414277.

### Comment 13

7 years ago
(In reply to comment #11)
> U+0302 is defined as a combining circumflex.  It's purpose is to display a
> circumflex over the following character thus combining this pair of Unicode
> characters to form a single displayed symbol.
>
> As such, IMHO it should never stretch.

I realize it is incorrect to say it should never stretch.  I suppose if the
following character stretches it could be stretched to the same width.  But the
point is that by definition, it should always be only over the following
character, so should not stretch to cover the width of the 3 characters in the
given testcase.

Sorry for the bugspam.

### Comment 14

7 years ago
> This is the same as the original testcase with the exception of using U+005E
> for the hat rather than the incorrect U+0302.

I think your right. MathML Operator Dictionary (and also our version) contains U+005E but not U+0302.

### Updated

7 years ago
Depends on: 567718

### Updated

7 years ago
Status: NEW → RESOLVED
Last Resolved: 7 years ago
No longer depends on: 567718
Resolution: --- → FIXED

### Updated

7 years ago
Target Milestone: --- → mozilla2.0b4
You need to log in before you can comment on or make changes to this bug.